Abstract
During the period 1983-1987, retranslocation of N, P, K, Ca, Mg, Mn, Zn, Fe, B and Al within the foliage of Scots pine (Pinus sylvestris L.) was studied in sapling, pole-stage and mature stands in eastern Finland. Needle concentrations of the mobile nutrients N, P, and K varied seasonally because of retranslocation. In unfertilized plots, needle contents of N, P and K decreased 62-92% during senescence and needle dry weight decreased 19-51%. In some years, needle contents of Ca, Mn, Zn, Fe, B and Al increased during senescence. Retranslocation was more efficient from needles with greater dry weight. In the fertilized, pole-stage stand, needle dry weight did not decrease at senescence four years after fertilization and nutrient content decreased less than in the other years. In the mature stand, there were no clear differences in needle dry weight and nutrient changes during senescence between years or between unfertilized and fertilized plots.
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Claims 9
Claim · model-written summary
In unfertilized plots, needle N, P and K contents of Scots pine decreased by 62-92% during senescence.
- Taxon
- Pinus sylvestris
Pinus sylvestrise0 - Organ / stage
- needlee1
- Treatment
- senescencee1
- Outcome
- needle contents of N, P and Ke1
- Direction
- decreasede1
- Value
- 62-92%e1
- Qualifier
- In unfertilized plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scots pine (Pinus sylvestris L.)”
e1“In unfertilized plots, needle contents of N, P and K decreased 62-92% during senescence”
Claim · model-written summary
Needle dry weight of Scots pine decreased by 19-51% during senescence in unfertilized plots.
- Taxon
- Pinus sylvestrisPinus sylvestrise0
- Organ / stage
- needlee2
- Outcome
- needle dry weighte2
- Direction
- decreasede2
- Value
- 19-51%e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scots pine (Pinus sylvestris L.)”
e2“needle dry weight decreased 19-51%”
Claim · model-written summary
In some years, needle Ca, Mn and Zn contents of Scots pine increased during senescence.
- Taxon
- Pinus sylvestrisPinus sylvestrise0
- Treatment
- senescencee3
- Outcome
- needle contents of Ca, Mn, Zne3
- Direction
- increasede3
- Qualifier
- In some yearse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scots pine (Pinus sylvestris L.)”
e3“In some years, needle contents of Ca, Mn, Zn, Fe, B and Al increased during senescence”
Claim · model-written summary
In some years, needle Fe, B and Al contents of Scots pine increased during senescence.
- Taxon
- Pinus sylvestrisPinus sylvestrise0
- Treatment
- senescencee3
- Compound
- Fe, B and Ale3
- Outcome
- needle contentse3
- Direction
- increasede3
- Qualifier
- In some yearse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scots pine (Pinus sylvestris L.)”
e3“In some years, needle contents of Ca, Mn, Zn, Fe, B and Al increased during senescence”
Claim · model-written summary
Nutrient retranslocation was more efficient from needles with greater dry weight in Scots pine.
- Taxon
- Pinus sylvestrisPinus sylvestrise0
- Organ / stage
- needlese4
- Outcome
- Retranslocatione4
- Direction
- more efficiente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scots pine (Pinus sylvestris L.)”
e4“Retranslocation was more efficient from needles with greater dry weight”
Claim · model-written summary
In the fertilized pole-stage stand, needle dry weight of Scots pine did not decrease at senescence four years after fertilization.
- Taxon
- Pinus sylvestrisPinus sylvestrise0
- Organ / stage
- needlee5
- Treatment
- fertilizatione5
- Outcome
- needle dry weighte5
- Direction
- did not decreasee5
- Setting
- pole-stage stande5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scots pine (Pinus sylvestris L.)”
e5“In the fertilized, pole-stage stand, needle dry weight did not decrease at senescence four years after fertilization”
Claim · model-written summary
In the fertilized pole-stage stand, nutrient content decreased less during senescence than in the other years.
- Taxon
- Pinus sylvestrisPinus sylvestrise0
- Treatment
- fertilizatione5
- Outcome
- nutrient contente6
- Direction
- decreased lesse6
- Comparator
- the other yearse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scots pine (Pinus sylvestris L.)”
e5“In the fertilized, pole-stage stand, needle dry weight did not decrease at senescence four years after fertilization”
e6“nutrient content decreased less than in the other years”
Claim · model-written summary
In the mature stand, needle dry weight and nutrient changes during senescence showed no clear differences between years or between unfertilized and fertilized plots.
- Taxon
- Pinus sylvestrisPinus sylvestrise0
- Treatment
- unfertilized and fertilized plotse7
- Outcome
- needle dry weight and nutrient changese7
- Direction
- no clear differencese7
- Setting
- mature stande7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scots pine (Pinus sylvestris L.)”
e7“In the mature stand, there were no clear differences in needle dry weight and nutrient changes during senescence between years or between unfertilized and fertilized plots”
Claim · model-written summary
Needle concentrations of the mobile nutrients N, P and K vary seasonally because of retranslocation.
- Taxon
- Pinus sylvestrisPinus sylvestrise0
- Outcome
- Needle concentrations of the mobile nutrients N, P, and Ke1
- Qualifier
- because of retranslocatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scots pine (Pinus sylvestris L.)”
e1“Needle concentrations of the mobile nutrients N, P, and K varied seasonally because of retranslocation”